Create dynamic key in object JS

Question

So I want to create a dynamic key in a js object. I know I can create it like this but id doesn't fullfil my requirements

return {
  [dynamicKey]: value
}

But the problem is I want something like this

return {
  [dynamicKey]_id: value
}

but it doesn't let me, I tried concatenating but it didn't work.

return {
  [dynamicKey] + '_id': value
}

I've also searched online for a solution but couldn't find any.

[dinamicKey + '_id']: value - the whole expression must be inside the square brackets. — VLAZ
– VLAZ, Commented Aug 2, 2021 at 20:09

stackoverfloweth · Accepted Answer · 2021-08-02 20:09:59Z

4

you need to put your _id string inside of the square brackets or as part of the dinamicKey var.

return {
  [dinamicKey + '_id']: value
}

dinamicKey += '_id';
return {
  [dinamicKey]: value
}

answered Aug 2, 2021 at 20:09

stackoverfloweth

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Comments

Mukarram Ishaq · Accepted Answer · 2021-08-02 20:11:33Z

0

Any expression in the square braces will be executed just like a normal expression. So how about this:

return {
    [dinamicKey + '_id']: value
}

answered Aug 2, 2021 at 20:11

Mukarram Ishaq

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